<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <van-icon slot="left" name="cross" @click="$router.back()" />
    </van-nav-bar>
    <!-- from表单 -->
    <van-form @submit="onSubmit" ref="form">
      <van-field
      v-model="user.mobile"
        name="mobile"
        placeholder="请输入手机号"
        type="number"
        maxlength="11"
        :rules="userFormRules.mobile"
      >
        <i slot="left-icon" class="toutiao icon-shouji"></i>
      </van-field>
      <van-field
      v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        type="number"
        maxlength="6"
        :rules="userFormRules.code"
      >
        <i slot="left-icon" class="toutiao icon-yanzhengma"></i>
        <template #button>
          <van-count-down
            v-if="isDjsShow"
            :time="1000 * 60"
            format="ss s"
            @finish="isDjsShow = false"/>
          <van-button
            v-else
            @click="onSendSms"
            size="small"
            round
            class="send-sms-btn"
            native-type="button">发送验证码</van-button>
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button
        class="login-btn"
        block type="info"
        native-type="submit">登录</van-button>
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user'
export default {
  name: 'LoginIndex',
  components: {},
  props: {},
  data () {
    return {
      user: {
        mobile: '',
        code: ''
      },
      // 表单验证规则
      userFormRules: {
        mobile: [{
          required: true,
          message: '手机号不能为空'
        }, {
          pattern: /^1[3|5|7|8]\d{9}$/,
          message: '手机号格式错误'
        }],
        code: [{
          required: true,
          message: '验证码不能为空'
        }, {
          pattern: /^\d{6}$/,
          message: '验证码格式错误'
        }]
      },
      isDjsShow: false
    }
  },
  computed: {},
  watch: {},
  created () {},
  mounted () {},
  methods: {
    // 表单提交事件
    async onSubmit () {
      // console.log(1)
      // 1 获取表单数据
      const user = this.user
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true,
        duration: 0
      })
      // 3 提交表单数据
      try {
        const res = await login(user)
        this.$store.commit('setUser', res.data.data)
        this.$toast.success('登录成功')
        this.$router.back()
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码输入错误')
        } else {
          this.$toast.fail('未知错误，请稍后重试')
        }
      }
      // 4 根据请求响应结果处理后续操作
    },
    // 发送验证码事件
    async onSendSms () {
      // 1 校验手机
      try {
        await this.$refs.form.validate('mobile')
      } catch (err) {
        return console.log('验证失败', err)
      }
      // 2 验证通过，显示倒计时
      this.isDjsShow = true

      // 3 请求发送验证码
      const user = this.user
      try {
        await sendSms(user)
      } catch (err) {
        // console.log(err)
        this.isDjsShow = false
        if (err.response.status === 429) {
          this.$toast('发送频繁，请稍后重试')
        } else {
          this.$toast('未知错误')
        }
      }
    }
  }
}
</script>

<style lang="scss" scoped>
  .login-container {
    .toutiao{
      font-size: 37px;
    }
    .send-sms-btn {
      // width: 160px;
      height: 46px;
      line-height: 46px;
      background-color: #dedede;
      font-size: 22px;
      color: #666;
    }
    .login-btn-wrap{
      margin: 53px 33px;
      .login-btn {
        background-color: #6db4fb;
        border: none;
      }
    }
  }
 </style>
